1900 East Baton Rouge ParishRebecca L. Impson LA MS SC was living with her daughter and son-in-law, Mary J. and John S. Powers and their 9 kids.

1900 Livingston ParishJohn Impson [son] and family

1910 Iberville Parish **John Impson [son] and family

1920 Livingston ParishJohn Impson [son] and family

***Since Rebecca Impson died in 1909 in White Castle [Iberville Parish], she may have been living with John and his family.

I did not find John H. Impson on the 1850 census for LA or MS. However, on the 1850 East Baton Rouge Census I found the following:James Shackleford 32 farmer MSTempy Simpson 53 GAJohn Simpson 18 MS

It is very possible that the name Simpson was recorded rather than Impson. This John's age "fits" and his birthplace of MS also "fits". In 1850 Rebecca's family was #896 and this Simpson family was #874. Therefore, the two families lived in the same general area. I have a feeling that this is indeed your John.